Im a big fan of Buck convertors and making my own PSU chargers, that way I know my current limitations and I can change them easily. I have several echo inputs and dots around the house and in most cases I use 12vdc PSU thats powering other stuff like LED lighting or Bluetooth amplifiers, then I use Buck convertors to drop the voltage for the 5v stuff. I have a ten amp PSU in the top garage thats powering Bluetooth in the Kitchen speakers VIA a Buck, Echo in the kitchen Via a Buck, 12v LED strip lights, and a 12v wireless receiver to switch stuff (like the lights and the speakers on and off) On the landing I have the droid pad, I have 12v dc powering a receiver and a buck , the receiver is on a timer progged by Sonoff and it switches the buck on and off so that the driod gets a couple of hours charge per day, the is another buck running off the same psu powering an input on the landing. I have voice control nearly everywhere I am in the house.Mostly powered by 12vdc and bucks